Simulation of Non-Newtonian shear flow over a circular cylinder
Publish place: International Journal of Mechatronics, Electrical and Computer Technology، Vol: 4، Issue: 13
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMEC-4-13_019
تاریخ نمایه سازی: 16 فروردین 1395
Abstract:
In this study, shear flow over a circular cylinder has been investigated numerically using lattice Boltzmann method. Non-Newtonian behavior of fluid has been considered using power law model for non-Newtonian fluids. In particular, the effects of power law index (0.4≤n≤1.8) and shear rate (0≤SR≤0.2) on vortex pattern and flow induced forces parameters at a fixed Reynolds number (Re=100) are presented in detail. Results show thatthe vortex-shedding frequency significantly decreases with increasing the power-law index.Shear rate also plays the same role and reduces the Strouhal number as it grows. This effect becomes more evident as the shear rate gets bigger.
Keywords:
Multiple-relaxation-time Lattice Boltzmann method , Power-law fluids , Drag coefficient , Lift coefficient , Shear circular cylinder
Authors
Mohammad Ali Raei
Department of Mechanical Engineering, Ayatollah Amoli branch, Islamic Azad University, Amol, Iran
Atena Ghaderi
Department of Mechanical Engineering, Ayatollah Amoli branch, Islamic Azad University, Amol, Iran
Keivan Fallah
Department of Mechanical Engineering, Sari branch, Islamic Azad University, Iran